Patents by Inventor Richard L. Franz

Richard L. Franz has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Herbicidal compositions for acetochlor in rice
    Patent number: 6071856
    Abstract: This invention is directed to an herbicidal composition comprising,a) an herbicidally effective amount of acetochlor; andb) a non-phytotoxic antidotally effective amount of a compound according to formula (I), ##STR1## wherein each of R.sup.1 and R.sup.2 independently represents one or more substituents selected from hydrogen, (C.sub.1 -C.sub.6)alkyl, (C.sub.1 -C.sub.6)alkoxy, (C.sub.1 -C.sub.6)alkylamino, halo, halo(C.sub.1 -C.sub.6)alkyl, (C.sub.1 -C.sub.6)alkoxy-(C.sub.1 -C.sub.6)alkyl and nitro;wherein A is selected from ##STR2## wherein each of R.sup.3 and R.sup.4 is independently selected from hydrogen, (C.sub.1 -C.sub.6)alkyl, halo(C.sub.1 -C.sub.6)alkyl, cyano(C.sub.1 -C.sub.6)alkyl, (C.sub.1 -C.sub.6)alkoxy-(C.sub.1 -C.sub.6)alkyl, (C.sub.2 -C.sub.6)alkenyl, (C.sub.2 -C.sub.6)alkynyl, phenyl, nitrophenyl, benzyl, halobenzyl, pyridinyl(C.sub.1 -C.sub.6)alkyl and (C.sub.1 -C.sub.6)alkylammonium; and n is 0 or 1.
    Type: Grant
    Filed: March 4, 1997
    Date of Patent: June 6, 2000
    Assignee: Zeneca Limited
    Inventors: Don R. Baker, Richard L. Franz, Khosro Khodayari
  • Synergistic herbicidal combination
    Patent number: 5928994
    Abstract: Control of weeds in a rice crop is obtained by applying to the crop, the weeds, or the locus of either, a herbicidal composition containing molinate and oxyfluorfen in a weight ratio of from about 500:1 to about 30:1.
    Type: Grant
    Filed: September 2, 1998
    Date of Patent: July 27, 1999
    Assignee: Zeneca Limited
    Inventors: Richard L. Franz, Jee Mok Fua, Khosro Khodayari